Lock.



PATENTED OCT. 16, 1906.

A. V. OHISHOLM.

LOCK. APPLICATION FILED JULY1 9.l905.

PI G. 1.

W1 'IYVESSES:

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ALEXANDER V. CHISHOLM,

OF CAMBRIDGE, MASSACHUSETTS, ASSIGNOR OF ONE-HALF TO ALFRED ELA,

OF SALEM, NEW HAMPSHIRE.

LOCK.

Specification of Letters Patent.

Patented Oct. 16, 1906.

Application filed July 19,1905. Serial No. 270,368-

To aZZ whom it may concern:

Be it known that I, ALEXANDER V. CHIS- HOLM, a subject of the King of Great Britain, residing at Cambridge, in the county of Middlesex and State of Massachusetts, have invented new and useful Improvements in Locks, of which the following is a specification.

The object of the invention is the production of a combination-lock which shall be simple in construction, comprised of few parts, and cheap in first cost, and which shall be adapted for easy application in connection with the swinging doors of safes, closets, houses, &c.

The invention consists in certain novelties of construction and combinations and arrangements of parts, as hereinafter set forth and claimed.

The accompanying drawings illustrate an example of the physical embodiment of the improvements constructed according to the best mode I have so far devised for the practical application of the principle.

Figure 1 is a plan view of a section of a door and door-jamb, showing the parts of the lock which are visible on the outside of the door. Fig. 2 is a section of Fig. 1 on line as 2;. Fig. 3 shows the disks and tumbler-disks re moved from the door and partly in section. Fig. 4 is a top plan view of the bolt and one of the tumbler-disks, both being removed from the door.

Referring to the several figures, the numeral 1 designates the safe, closet, or other door to which the lock is applied; 2, a circularrecess cut out from the inner surface of the door to receive the tumbler-disks, the diameter of the circle being greater than the diameter of the disks, so that the hinged end of the bolt may project into the space outside the circumference of the said disks; 3, a slot for the bolt; 4, a slot to receive the stem for operating the bolt; 5, a circular hole in the door to receive the sleeve of the disk 11, which sleeve is substantially of the same diameter as the hole 6, the jamb of the door or other part of the structure to which the closed door is to be locked; 7, the seat to receive the end of the bolt; 8, a plate upon the inside of the door and secured in place by screws or in any other way; 9, a recess in the face of the plate to allow the hinged end of the bolt to ride over the surface of the lower tumbler-disk when the bolt is withdrawn from the jamb of the door; 10, the sleeve for the disk 11; 11, a disk; 12, a turnbler-disk; 13, a slot in the edge of the upper tumbler-disk; 14, an indicator-mark on the surface of the disk 11; 16, the outer disk or knob; 17, the lower or tumbler disk; 18, a slot in the edge of the lower tumbler-disk; 19, the shaft or body for the disk or knob; 20, a screw which detachably secures the tum bler-disk 17 to the shaft; 21, an indicatormark upon the outer disk; 22, a dial with spaced numerals upon the door; 23, the bolt; 24, the hinged inner end of the bolt; 25, the pivotpin; '26, a recess in the hinged end 24 to allow the said end to rest upon the surface of thetumbler-disk 17 when the bolt is withdrawn from the jamb or when retracted; 27, a spring secured to the door at one end and with its free end resting against the hinged end of the bolt, and 28 is a stem with a knob, said stem being secured to the bolt and located and movable within the slot 4 of the door. The modus operandi is as follows: Assuming the slots 13 and 18 in the tumbler-disks 12 and 17 to coincide when the indicator-marks 14 and 21 point to numerals 3 and 8 upon the dial, the bolt can be retracted by the hinged end entering the slots 13 18 forcing the spring away from the tumbler-disks and taking the position shown in dotted lines in F ig. 2 upon the surface of the tumbler-disk 17. To look the door, the bolt is first moved toward the left until the end moves upwardly under the pressure of the spring, in line with the main portion of the bolt 23, and then the disks 11 and 16 by turning one or both are caused to occupy positions relative to-each other, so that slots 13 and 18 will not coincide. It will be observed that the bolt 23 is located at right angles to the axes of sleeve 10 and shaft 19, these axes coinciding, and that the hinged inner end 24 of the bolt has a movement about its pivot in a direction parallel with the axes of the said sleeve 10 and shaft 19 so that its'free end may when the bolt is retracted take a position outside the disk 17 and within the recess 9 in the face of the plate.

From the foregoing description, taken in connection with the drawings, it is clear that troduced which will not constitute substantial departures.

What I claim as new, and desire to secure by Letters Patent, is

' 1. The combination with a door, of a plurality of outer disks and inner tumbler-disks united by a sleeve and shaft, said inner tumbler-disks being slotted; a bolt located at right angles to the sleeve and shaft and provided with a hinged inner end having a recess 26 in its edge for the purpose specified which inner end when it coincides with the slots in the tumbler-disks may be moved rcarwardly in a direction parallel with the axes of the sleeve and shaft to a position outside the tumbler-disks; and means for reciprocating the bolt.

2. The combination with a door, of a plurality of outer disks and inner tumbler-disks united by a sleeve and shaft, said inner tumbler-disks being slotted; a bolt located at right angles to the sleeve and shaft and provided with a hinged inner end which when it coincides with the slots in the tumbler-disks may be moved rearwardly in a direction parallel with the axes of the sleeve and shaft to a position outside the tumbler-disks; a spring engaging the hinged inner end of the bolt; and holding the same in line with the main portion 23 of the bolt when the same is in a locked position and means for reciprocating the bolt.

3. The combination with a door having a recess on the inner surface, of a plurality of outer disks and inner tumbler-disks united by a shaft and sleeve, said tumbler-disks being slotted and located within the recess of the door; a recessed plate on the inner surface of the door; a bolt with a hinged inner end, said end being movable in a direction parallel with the axes of the shaft and sleeve which unite the disks; a spring bearing against the hinged inner end of the bolt; and means for reciprocating the bolt; the hinged end of the bolt when the door is locked lying in line with the main portion or body of the said bolt.

In testimony whereof I affix my signature in presence of two witnesses.

ALEXANDER V. CHISHOLM.

Witnesses: r

M. P. CHANDLER, ALFRED ELA. 

